why does the internet page, calendar, email or any ap enlarge when I simply move the magic mouse over the screen
When using google internet pages, calendar, email and I move the Magic Mouse 2 over the calendar it automatically enlarges which is irritating. Is there an easy way to undo this? To get back to the original size that things were prior to moving the mouse over it?

How long is a piece of string ? The mouse uses power when you use it and manages it when you don't so it can be a few weeks or a few months depending on how you use it. You shouldn't plug it in to charge each night as you will risk destroying the charge carrying ability of the onboard battery, I'd suggest between 1 week and 1 month between charges depending on how long you use the mouse in that time, more frequently if the low warning comes on.